Everyone has the right to freedom of thought, conscience, and religion, which includes the freedom to manifest one’s religion or belief, either individually or in community with others, in public or private. This right applies to those for whom such manifestations may involve the use of drugs for religious or spiritual purposes.
In accordance with this right, States may:
i. Utilise the available flexibilities in the UN drug control conventions to decriminalise the possession, purchase, or cultivation of controlled substances for personal consumption.
In addition, States should:
ii. Consider exemptions within drug legislation allowing the cultivation and use of controlled substances for religious purposes, including in rituals and ceremonies.
Here is where you will see the cited reference for the Commentary feature.